Colloquium: Claudia Felser on Magnetic Materials

Claudia Felser, Max Planck Institute For Chemical Physics of Solids

Magnetic Materials and Topology

Abstract:  Topology, a mathematical concept, recently became a hot and truly transdisciplinary topic in condensed matter physics, solid state chemistry and materials science. All 200 000 inorganic materials were recently classified into trivial and topological materials: topological insulators, Dirac, Weyl and nodal-line semimetals, and topological metals [1]. Around 20% of all materials host topological bands. Currently, we have focused also on magnetic materials, a fertile field for new since all crossings in the band structure of ferromagnets are Weyl nodes or nodal lines [2], as for example Co 2 MnGa and Co 3 Sn 2 S 2 . Beyond a single particle picture and identified antiferromagnetic topological materials [3].


1. Bradlyn et al., Nature 547 298, (2017), Vergniory, et al., Nature 566 480 (2019).
2. Belopolski, et al., Science 365, 1278 (2019), Liu, et al. Nature Physics 14, 1125 (2018), Guin, et al.
Advanced Materials 31 (2019) 1806622, Liu, et al., Science 365, 1282 (2019), Morali, et al., Science
365, 1286 (2019)
3. Xu et al. Nature 586 (2020) 702.